Mutualism is a type of symbiosis that occurs when two unlike organisms live together in a state that is mutually beneficial.
Regular exercise and good diet will bring______fitness and health.
Education in many countries is compulsory________the age of 16.
He_______________us but he was short of money at the time.
We must push the piano to the corner of the hall to_____________________ our party tonight.
The Lake District,____________________ was made a national park in 1951, attracts a large number of tourists every year.
__________ John Kennedy was elected president, he was the youngest American President ever.
______ one of the most beautiful forms of performance art, ballet is a combination of dance and mime performed to music.
The examination was not very difficult, but it was_____________________ long.
There has been a great increase in retail sales,_____________________ ?
Standing on the tip of the cape,____________________ .